Feral Ghoul Reavers are extremely strong ferals clothed in what appears to be the remains of metal armor. Reavers' skin may, upon close inspection, appear to bubble and burn, emitting radiation and dark green smoke. If a reaver is killed by a critical hit from an energy weapon, the smoke will continue to emanate from the remains. Tougher than other ghouls, reavers are one of the most formidable enemies in the game. They are extremely quick, even high-level players may, if not careful, be quickly crippled or killed by a reaver's powerful melee attacks. Reavers have the unique ability to throw pieces of their own body at a target. These chunks, thrown with deadly accuracy, explode like a grenade. Reavers seem to be highly perceptive and can detect player characters who are sneaking, even while wearing a Stealth Boy or Chinese Stealth Armor. The Feral Ghoul Reaver can be a massive threat to low level players, easily killing them in a few hits.

Upon detecting a non-ghoul, most ferals will make a high-pitched gurgle or screech, and set out to search the area. Upon sighting prey, they will often scream once more, alerting any nearby ghouls, and attack. There is no rank or pecking order to these attacks; all attack at the same time in a rampant onslaught. Because of this, in enclosed areas like Vaults, it is very easy to get overwhelmed. Feral ghouls mainly attack with their hands, slashing and smashing in an insane fury. Some feral ghouls can be seen to use weapons, such as the trooper ghouls in Camp Searchlight, likely indicating that they have only gone feral recently.

Ghoulification(Ex): +9 Str, +9 Dex, +9 Con (already factored into stats). Regains 2 HP per radiation level per turn when in irradiated areas not being resisted. Meaning that a Ghoul with a higher radiation resistance must be in areas with higher radiation in order to be healed by it.